<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Object</title>
    <!--引入Vue-->
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <!--数据代理:通过一个对象代理对另一个对象中属性的操作(读写)-->
</body>

<script type="text/javascript">
    let obj = {x:100}
    let obj2 = {y:200}

    Object.defineProperty(obj2,'x',{
        get(){
            return obj.x
        },
        set(v) {
            obj.x = v
        }
    })
</script>
</html>
